I would solve the multi-homing at the router, not the firewall.
Just get a router that has an sdsl interface as well as (I assume) a
serial for your point to point laser connection. Set the router to use the
sdsl link when the primary laser link goes down. It all looks exactly the
same to the firewall.
You won't need to use BGP in this case at all. In fact, I doubt you'll
find anyone that's will to be a BGP peer over SDSL.
On Sun, 8 Jul 2001, Byron Kennedy wrote:
> Need to Multi-home a network and just curious how others are dealing with
> this issue out there.
>
> Background:
>
> E-commerce client (50 node) has one "line-of-sight" laser internet
> connection now at 1.5 MB (I think) w/ Cisco router. Because this technology
> can be a little temperamental the client would like to have a redundant
> internet link via SDSL to provide better up-time. Firewall is SonicWall
> (not sure of exact model yet). Inbound services are probably smtp and ipsec,
> everything else is hosted at co-lo. Next meeting would fully clarify
> topology and services.
>
> I do know the client has the following needs:
>
> 1. Absorb an outage over either internet feed, while still providing
> outbound http access for the internal clients. Client simply needs to
> "always have access" to the hosted app at co-lo.
> 2. Load-balance the feeds to achieve maximum ROI (return on investment).
>
> Questions:
>
> 1. Are others doing this for relatively small shops?
> 2. What minimum technologies to we need to meet the above goals? My concern
> is asymmetric routing.
> 3. Can we do this w/o BGP?
>
> Thanks for any pointers or wisdom.
>
> cheers.Byron
>
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